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To: FreeBSD-users-jp@jp.freebsd.org, yaka@alles.or.jp
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Date: Fri, 05 Dec 1997 01:37:41 +0900
From: masahiro@inet.isogo.yokohama.jp (Masahiro Higuchi)
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Subject: [FreeBSD-users-jp 21800] Re: about sendmail
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$BHu8}!w2#IM$G$9!#(B

From: yaka <yaka@alles.or.jp>

yaka>                 $B30It(B
yaka>                   |
yaka>                [router]
yaka>                   |
yaka>             [Mail Server] hoge.co.jp
yaka>                   |
yaka>               [FairWall]
yaka>                   |
yaka>                 -----
yaka>                 |   |
yaka>       -----------   --------------  
yaka>       |                          |
yaka> [Mail Server]              [Mail Server]
yaka>   sub1.hoge.co.jp            sub2.hoge.co.jp

yaka> $B$D$^$j!"30It$+$i(Bsub$B%I%a%$%s08$N%a!<%k$O!"(BFairWall $B$rDL2a$G$-$J$$(B
yaka> $B$N$G$9!#(B
yaka> 
yaka> $BBP:v$H$7$F!"(BPOP$B%/%i%$%"%s%H$N$h$&$K!"(Bsub$B%I%a%$%sB&$N(B MailServer $B$+$i!"(B
yaka> $B<h$j$K9T$1$J$$$b$N$+$H!"(BCF $B$N%I%-%e%a%s%HEy$r8+$?$N$G$9$,!"$=$l$i$7$-(B
yaka> $B@_Dj$,8+$D$1$i$l$^$;$s$G$7$?!#(B
yaka> 
yaka> sendmail $B$G$O!"$3$NMM$J1?MQ$O$G$-$J$$$N$G$7$g$&$+!)(B

$B>e5-$N9=@.$G$J$1$l$P$J$i$J$$$N$G$7$g$&$+!)(B
hoge.co.jp$B$N(BMail Server$B$r(BFirewall$B$NFbB&$KCV$/$N$O$@$a$J$N$G$7$g$&$+!)(B
$B!J(BO'REILLY$B$N!V%U%!%$%"%&%)!<%k$N9=C[!W$K$b=P$F$$$k$H;W$$$^$9!#!K(B

$B$=$l$K!">e5-$N9=@.$@$H!"(BMail Server$B$r(BFirewall$B$N30B&$KCV$/$N$G!"(B
Mail Server$B$r(BFirewall$B$G<i$k$3$H$,$G$-$J$/$J$j$^$9!#(B


hoge.co.jp$B$N(BMail Server$B$r(BFirewall$B$NFbB&$KCV$/>l9g$N$d$j$+$?$O!"(B
Firewall$B$N30B&$N(Bhoge.co.jp$B%I%a%$%s$N(BDNS$B$N(BMX$B%l%3!<%I$N@_Dj$G!"(B
hoge.co.jp$B%I%a%$%s08$N%a!<%k$O!"%U%!%$%"%&%)!<%k$NFbB&$N(Bhoge.co.jp$B$N(B
Mail Server$B$KAw$j$^$9!#(B
hoge.co.jp$B$N(BMail Server$B$O!"FbIt$N(BDNS$B$N%(%s%H%j!<$+$i!"(Bhoge.co.jp$B$N(B
$B%5%V%I%a%$%s$N(BMail Server$B$rC5$7$F!"%5%V%I%a%$%s$N(BMail Server$B$K(B
$BE>Aw$9$k$h$&!"(Bsendmail.cf$B$r@_Dj$7$F$*$-$^$9!#(B

$B$=$l$+$i!"(BFirewall$B$,(Bhoge.co.jp$B$N(BMail Server$B$"$F$N(BSMTP$B$@$1$ODL$9$h$&$K(B
$B@_Dj$7$F$*$/I,MW$,$"$j$^$9!#(B

hoge.co.jp$B$N%5%V%I%a%$%s$N(BMail Server$B$O!"(Bhoge.co.jp$B$N(BMail Server$B$K(B
$B%a!<%k$rAw$j$D$1$k$h$&!"(Bsendmail.cf$B$r@_Dj$7$^$9!#(B

$B$b$7!"(BFirewall$B$NFbB&$N(BIP$B%"%I%l%9$,(BFirewall$B$N30B&$K=P$;$J$$>l9g!"(B
$B!J(BFirewall$B$NFbB&$r(BPrivate Address$B$K$9$k>l9g$J$I!K(B
hoge.co.jp$B$N(BIP$B%"%I%l%9$O!"(BFirewall$B$N30B&$N(BDNS$B$G$O0z$1$^$;$s$+$i!"(B
Firewall$B$N9=@.$rJQ$($kI,MW$,$"$k$H;W$$$^$9!#(B

$BNc$($P!"(Brouter$B$,$b$&(B1$BBfI,MW!"(BMail Server$B$O(BIP forwarding$B$7$J$$(B
$B$J$I>/$79=@.$,J#;($K$J$j$^$9$,!"0J2<$N$h$&$J9=@.$b$G$-$k$H;W$$$^$9!#(B


              |
            router
              |
            Firewall 
              |
              +---------+ $B30It$H%k!<%F%#%s%0$,$G$-$k%M%C%H%o!<%/(B
              |         | (Firewall$B$G%U%#%k%?%j%s%0$5$l$F$$$k(B)
           router   Mail Server
              |         |
              +---+-----+ 
                  |
              hoge.co.jp$B$N(BPrivate Address$B6u4V(B

$B$$$C$=$N$3$H!"(BMail$B$NCf7Q$,$G$-$k(BFirewall$B$K$9$k$H$$$&$N$,0lHV0BD>$K(B
$B$G$-$k$H;W$$$^$9!#(BFirewall$B%=%U%H%&%'%"$N%a!<%kCf7Q%=%U%H$NCf$K$O(B
$B%&%#%k%9F~$j$N%a!<%k$r=|5n$9$k$b$N$b$"$j$^$9$7!D(B


---
$BHu8}2m90(B	Higuchi, Masahiro
Internet:		higuchi@inet.isogo.yokohama.jp
WWW Home Page:		http://kfn.ksp.or.jp/~mhiguchi/
